Wave Crystal Group
Classical waves crystals, photonic crystals, sonic crystals, opals; Madrid, Spain.
http://www.icmm.csic.es/cefe/

Snow Crystals
Information about the physics of snow crystals and snowflakes as well as the history of early scientific observations and photographs, how to take photos, preserving snow crystals, and unusual snowflakes.
http://www.its.caltech.edu/~atomic/snowcrystals/

Snow Crystals
Information about the physics of snow crystals and snowflakes as well as the history of early scientific observations and photographs, how to take photos, preserving snow crystals, and unusual snowflakes.
http://www.its.caltech.edu/~atomic/snowcrystals/

Snow Crystals
Information about the physics of snow crystals and snowflakes as well as the history of early scientific observations and photographs, how to take photos, preserving snow crystals, and unusual snowflakes.
http://www.its.caltech.edu/~atomic/snowcrystals/

JAN Crystals
Manufacturer of crystal oscillators and microprocessor, AT-Strip, and custom designed crystals.
http://www.jancrystals.com/

United Crystals Company
United Crystals Company manufactures KTP, BBO, Nd:YVO4, YVO4, LiIO3, DKDP, KDP, ADP, AgGaS2, AgGaSe2 devices, Polarizers and Waveplates for various lasers.
http://www.unitedcrystals.com

ESKA Crystals
Eska Crystals - Worldwide Fast Delivery of all types of quartz crystals , Clock Oscillators and Crystal Filters
http://www.geocities.com/eska_crystals/index.html

Cradley Crystals
Single-crystals of YAG, LiNbO3, LiTaO3, KDP, DKDP, ZnSe, MgF2, and CaF2.
http://www.cradley-crystals.com

Ioffe Physico-Technical Institute: Shaped Crystals Growth Group
Research in the shaped crystals growth. Main interest is a Sapphire shaped crystals growth: sapphire tubes, rods, and ribbons. For optics, mechanics, medicine and other applications.
http://www.ioffe.rssi.ru/SCPLAB/index.htm

Superconix Inc.
Sale of technical/scientific crystals, semiconductors, non-linear optical, electro-optic, substrates, SAW, acousto-optical, metals, laser, bi-refringent, infrared windows, ferro-electrics, boules, single crystal boules, AlN substrates, Al2O3 substrates, YBa2Cu3O7 thin films, YBCO thin films, DC SQUIDS, targets, sputtering targets, nano ceramic powders
http://www.superconix.com/